Cut-off device for fluid-fuel burners.



J. W. PEPLINSKI. CUT-OFF DEVICE FOR FLUID FUEL BURNERS. APPLIOATIONFILED JAN.17, 1910. RENEWED PEB.19, 1912,

Patem ad Oct. 1, 1912.

SHEETS-SHEET 1.

MUMLW In D J. w. PEPLINSKI.

OUT-OFF DEVICE FOR FLUID FUEL BURNERS.

APPLICATION EILED JAN.17, 1910. RENEWED FEB. 19, 1912.

1,039,793. Patented Oct. 1, 1912.

v 2 SHEETS-SHEET 2. J

. gas,it very often happens that the pressure proper combustion, and thepassage of par- I of the features of the invention, it is appli- UNITEDSTATES PATENT OFFICE.

C JULIUS W. PEPLINSKI, OF ERIE, PENNSYLVANIA, ASSIGNOR '10 SECURITYsnvmes AND TRUST 00., TRUSTEE, TION or PENNSYLVANIA.

OF ERIE, PENNSYLVANIA, A CORPORA- GUT-OFF DEVICE FOR FLUID-FUEL BURNERS.

Specification of Letters Patent.

Patented 0011.1, 1912.

Application filed January 17, 1910, Serial in; 538,391. Renewed February19.1912. Serial no. v

To all whom it may concern:

Be it known that I, Junrus W. PEPLmsKI, a citizen of the United States,residing at Erie,.county of Erie, and State of Pennsyl- Vania, haveinvented Cut-Off Devices for Fluid-Fuel Burners, of which the followingis a'specification. This invention relates tocut-olf devices for fluidfuel burners, and consists in certain. improvements in the constructionthereof as will be hereinafter fully described and pointed out in theclaims. l In the burning otfluid fuel, especially of gas in the line isreduced to such an ex tent as to extinguish the fire at the burner, andit also happens that the pressure increases to such an extent as toresult in imtially consumed gas which is very dangerous.

The object of this invention in its broader aspects is to provideagainst these contingencies. In the broader aspects as to some cable toone of these disadvantages, that is, the reduction or increase of thegas pressure alone- In carrying out my invention I have utilized anordinary controller valve so that the gns may be turned on or ofiwithout any especial care on the part of the operator. The mechanismsfor the safety deviceswork automatically, so that: they are disengagedand thrown into engageinentwithout any attentionon the part of the:operator.

' The invention is illustrated in the accompanying drawings as follows:i

i Figure 1 is an elevation of a burner with the safety device in placethereon; Fig. 2 a section on the line 22 in Fig. 1; Fig. 3 is a centralsection through the device on the line 83 in Fig. 4; F ig. 4 is a planview of the valve; Fig. 5 is a section similar to Fig. 8 but with theparts disengaged or in the position assumed when the controllingvalve isclosed.

1 marks the burner, 2 the mixer. These are ofordinary construction. Ajet 3 extends into the mixer. This is carried in the fitting 4. Thefitting 4 is screwed into thel discharge end of the gas controllingvalve 5.

This, is the ordinary angle valve used on;-

stoves for this purpose; it has theinlet 6;;

. diaphragm 7; needle valve 8 operating in the opening 9; and the stem10 having the screw 11 and extending through the gland 12 and providedwlth the squared end 13.

The thermostatic element 14 is carried by a guide 15 and 1s arrangedabove the burner in position to receive heat from the fire at, theburner. The guide is formed by a plate '1 on which are a series of cars17 having perforations 18 in alinement. These form a loose fit on theelement 14:. They therefor-e maintain the alinement of the elementWith-Out interfering with its play lengthwise. 351e, guide is securedtothe stove 19 by screws ed and extends through the ear 21. Nuts 22-22are arranged on the element at each side of the ear, thus locking theend of th rod to the end of the guide.

The end of the element is screw threadi The .end of guide next the valvehas the screw threads 23. A trip mechanism frame 24 is also providedwith screw threads preferably of a pitch in a different directlon thanthe threads 23. A turn-buckle 26 is arranged on these screw threads. Thetrip mechanism frame is thus supported and nice means of adjustment isprovided be; tween the thermostatic element and the trip mechanismhereinafterdescribed.

, .An extension 27 is arranged on the valve stem. It has the squaredsocket 28.eng agingthe squared end 13. The extension prefer ably extendsbelow the squared end, the

socket 29 permitting so that the endmay rest on the valve if desired.The upper end I of the extension hasthe screw thread 30 which is screwedinto the hub 31 of the looking plate 32. A socketed nut 83 is screwedonto the upper 'end of the stem forming a jam nut for-locking thelocking plate in place on the extension. The upper end of the extensionis squared at 34; to receive the usual key 35 by means of which thevalve may be manually actuated at all times to either open or close.

The hub 31-is mounted in a bearing 36in the trip mechanism frame. A nut37 is screwed onto the lower end of the hub against the shoulder 38thus-securing the hub in the bearing yet leaving it free to rotatetherein. 4

A spring 39 is arranged in a cavityon the under side of the'lockingplate 32. One end of the spring extends into the perforation 40 intheplate and the other end of the spring extends into the perforation 41in the frame,

thusone end of the spring is locked to the plate and the other to theframe. The

spring is of sufiicient strength and is ten- 5 sioned to close the valvewhen the locking plate is released by rotating the plate and with it theextension and stem.

The locking disk has a series of notches 42 on its periphery into whicha locking pawl 43 extends. The pawl is carried in a groove 44 in thetrip mechanism frame and is forced forward by a spring 45 arrangedbetween the end of the pawl and the pin 46 secured to the frame andextending into the groove. The end of the pawl is so shaped withrelation to the notches 42 as to lock the disk against the energyexerted by the spring 39 but still permitting of the ready turning ofthe disk, to open or close the valve manually.

The thermostatic element on rod 14 is screwed into a slide 47 operatingin the groove 44. The slide is slotted at its point end and a connectingpawl 48 is pivotally secured in the end of the slide by the pin 49. Thepawl 48 extends through a slot 50 in the frame above the groove. Thepawl has the catch 51 adapted to engage a shoulder 52 on the lockingpawl 43 when the thermostatic element is expanded by a normal heat. Apin 53extends from the pawl 43 into the slot 50 to keep the pawl 48 fromturning in the groove.

A trip finger 54 extends from the front end of the connecting pawl 48and rides upon the face 55 ofthe locking disk or plate 32. A cam 56 isarranged at the end of this face 55. Just prior to the closing of the.valve and after the last notch 42 has passed the pawl 43 in the closingmovement the cam 56 passes under the inger 54 -and lifts the pawl 48 andthe catch 51 above the shoulder 52 so that with the contraction of thethermostatic element the pawl remains in position tolock the plate whenthe valve 45 is again opened. In order to allow for wear andinaccuracies of adjustment the cam is followed by the raised surface 57so that the finger is maintained in the elevated position as the cammoves past the finger with the movement completing the closing of thevalve.

The parts are initially in the position shown in Fig. 5. To light thefire the valve is manually operated, the pawl 48 looking the valve inany adjustment desired. As the thermostatic element expands under theinfluence of the heat it pushes the slide 47 and connecting pawl 48 intothe position shown in Fig. 3 the catch 51 dropping in front of theshoulder 52 in position to withdraw the pawl 43 should the temperaturefall below the normal without the manual closing of the valve. Thisautomatic closing of the valve moves the cam 56 under the finger 54 andraises the pawl 48 so that when the valve is again opened, the pawl 43 Iwill be free to lock it in the open position. The operator thereforesimply operates the valve in the usual manner and the pawl holds it inadjustment and trip mechanism is automatically thrown into and out ofengagement.

As hereto stated it is desirable to have the thermostat operate not onlywhen the fire is extinguished but also when the fuel pressure increasesabove the safety point. This, of course, is accompanied ordinarily byincrease of temperature of the fire, and this is utilized for closingthe valve. A reversing pawl 58 is mounted on the pin 59 extendingbetween the ears 60, the ears being formed with the frame. The reversingpawl has a catch finger 61 which engages the hook 62 on the pawl 43. Thepawl 48 has a shoulder 63 in position to engage an arm 64 on the upperend of the pawl 58, the parts whenthe thermostatic element is normallyexpanded being as shown in Fig. 3. When the thermostatic element expandsbeyond this normal position, the slide 47 is moved toward the tripmechanism carrying with it the pawl 48. The shoulder 63 engaging the arm64 forces the upper end of the reversing pawl toward the right, and thecatch finger 61 in the reverse direction, and thus operating upon thehook or shoulder 62, forces the pawl 43 out of engagement with thelocking disk, thus closing the valve. The cam 56 of course operatesineither instance to lift the pawl 48 so as to permit of the contractionof the thermostatic element as the fire is extinguished.

It will be seen therefore that with this construction the valve ismanually operated in either direction so that the operator simply goesthrough the usual movement of open ing and closing the valve, thethermostatic element automatically taking up the trip devices andautomatically disengaging therefrom. It will also be seen very readilythat the thermostatic element once in enga 'ement will trip the valvethus insuring sa ety against an increase or a decreasein pressure; Thearrangement of the trip mechanism at the level of the thermostaticelement permits of direct connection be- .tween the thermostatic elementand the devices operating the valve.

What I claim as new is:

1. The combination of a burner, a valve which controls the flow of fluidto the burner, a motor for closing the valve, means automaticallyactuated for locking the valve against movementthrough the energy of themotor, a thermostatic element that is subjected to the heat from theburner and a device actuated by the movement of the thermostatic elementfrom variations in temperature in either direction to unlock the valveto shut ofi' the fiow of the fluid.

9. The combination of a burner, a manually operative valve controllingthe fiow of fuel to the burner, a thermostatic element which issubjected to the heat from the burner, a motor for closing the valve, apawl for locking the valve against closing, devices acting with amovement of the thermostatic element through variations in temperaturein either direction for withdrawin the pawl to unlock the valve and toshut 0% the flow of the fluid.

3. The combination of a fuel controlling valve, a thermostatic element,a motor for actuating the valve, a pawl for locking the valve in an openposition, devices connecting .the pawl with the thermostatic elementcomprising a reversing mechanism which will convey the movement of thethermostatic element to the pawl and reverse the direction of themovement, and a mechanism connecting the thermostatic element with thepawl which will move the pawl in the direction of the movement of thethermostatic element.

4. The combination of a burner, a valve controlling the flow of fluid tothe burner, a thermostatic element. that is subjected to heat from theburner, a motor for closing the valve, a pawl for locking the valve inopen position, devices actuated by the thermostatic element forconveying the action of the thermostatic element to the pawl to withdrawthe pawl with a movement of the thermost-atic element in eitherdirection, said devices being initially disconnected and being throwninto connection by the action of the thermostatic element under normalheat from the burner, and acting on the pawl to move the pawl to aposition to unlock the valve to shut oil the flow of fluid as thetemperature of the thermostatic element is reduced below the normal onlywith a pre-determined low temperature of the element.

5. The combination of-a fuel controlling valve, a motor for actuatinsaid valve, :1 locking plate connected an moving with the valve, a camon the locking plate, a look? ing pawl acting on the locking plate tolock the valve in different positions varying the opening of the valve,a thermostatic element, a connecting pawl between the locking pawl andthe thermostatic element for conveying the movement of the thermostaticelement in one direction to the locking pawl, said connecting pawl beingadapted to be thrown out of engagement with said locking pawl by saidcam as the controlling valve is closed,

and devices acting upon the locking pawl and actuated by thethermostatic element for releasing the locking pawl when thethermostatic element moves in. the opposite direction.

6. The combination of a fuel controlling slot, and acting upon thelocking pawl, and

1n osition to be thrown out of engagement wit the locking pawl by saidcam, a reversing pawl pivotally mounted on the frame having one endoperating upon the locking pawl and the opposite end actuated by theconnecting pawl whereby the connecting pawl is thrown into engagementwith the locking pawl in a normal expansion of the thermostatic element,withdraws the said locking pawl upon the contraction of the thermostaticelement without the prior closing of the valve, is thrown out ofengagement withthe locking pawl by the cam when the valve is closed, andoperates upon the reversing pawl to withdraw the locking pawl when thethermostatic element is expanded beyond the normal.

7 In a cut-oil device for fuel burners, the combination of a burner, avalve controlling the flow of fuel to the burner, mechanism actuatingthe valve, a thermostatic element controlling the valve actuatingmechanism and a guide of different expansive quality than the elementsupporting the element against lateral distortlon at points along theelement subjected to heat and allowing a free longitudinal movement ofthe end of the-element the more remote from the valve actuatingmechanism, cured to one end of the guide and the o posite end of theguide being secured to t e valve actuating mechanism. 8. The combinationof a burner a thermostatic element in position to receive the heat fromthe burner, and a guide ,for said element comprising a plate with aseries ,of ears having perforation in alinement through which a portionof the element subjected to heat extends, the element being secured atone end to the guide, and devices actuated by the element connected tothe opposite end of the guide. a

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses. 7 v

, JULIUS W. PEPLINSKI. Witnesses:

I. A. CASSIDY, H. C. LORD.

the element being se-,

pawl, a thermostatic ele-

